133756013 has 4 divisors (see below), whose sum is σ = 133779648. Its totient is φ = 133732380.

The previous prime is 133756003. The next prime is 133756027. The reversal of 133756013 is 310657331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310657331 = 1381 ⋅224951.

It is a cyclic number.

It is not a de Polignac number, because 133756013 - 2⁴ = 133755997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133756003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270 + ... + 16512.

It is an arithmetic number, because the mean of its divisors is an integer number (33444912).

Almost surely, 2^133756013 is an apocalyptic number.

It is an amenable number.

133756013 is a deficient number, since it is larger than the sum of its proper divisors (23635).

133756013 is an equidigital number, since it uses as much as digits as its factorization.

133756013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23634.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 133756013 is about 11565.2934679583. The cubic root of 133756013 is about 511.4122245099.

The spelling of 133756013 in words is "one hundred thirty-three million, seven hundred fifty-six thousand, thirteen".